diff --git a/test/behavior/math.zig b/test/behavior/math.zig
index 2201efa1d227bdc3260f244d4c72dc06b475846e..092924af06ed18c8f71e660dd78ad90111513afa 100644
--- a/test/behavior/math.zig
+++ b/test/behavior/math.zig
@@ -1062,6 +1062,7 @@ test "@mulWithOverflow bitsize > 32" {
 test "@mulWithOverflow u256" {
     if (builtin.zig_backend == .stage2_c) return error.SkipZigTest;
     if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
 
     {
         const const_lhs: u256 = 8035709466408580321693645878924206181189;
diff --git a/test/behavior/struct.zig b/test/behavior/struct.zig
index c6f87309876fe545da87cefd98ad3beebce38f45..9f4d3f0298b20347776668bfad7fcc99571a6b52 100644
--- a/test/behavior/struct.zig
+++ b/test/behavior/struct.zig
@@ -2117,6 +2117,7 @@ test "initiate global variable with runtime value" {
 
 test "struct containing optional pointer to array of @This()" {
     if (builtin.zig_backend == .stage2_c) return error.SkipZigTest;
+    if (builtin.zig_backend == .stage2_spirv64) return error.SkipZigTest;
 
     const S = struct {
         x: ?*const [1]@This(),